To divide a chart axis into equal segments using a ruler (or scale), follow these steps:
- Identify the length of the axis that needs to be divided into equal parts.
- Place a ruler at an angle across the axis, so that the zero mark aligns with the starting point of the axis.
- Adjust the ruler’s angle until a convenient division on the ruler aligns with the endpoint of the axis. For example, if you want to divide the axis into five equal parts, tilt the ruler so that a multiple of five (such as 10 mm or 15 mm) aligns with the endpoint.
- Mark equal intervals along the ruler.
- Draw perpendicular projection lines from each mark down to the axis. You can use a triangle or another ruler to ensure accuracy.
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